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March 25, 2017

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If the digits 1 through 9 are written in order, it is possible to place plus and minus signs between
the numbers or to use no operation symbol at all to obtain a total of 100. For example,1 + 2 + 3 + -4 + 5 + 6 + 78 + 9 = 100
Can you obtain a total of 100 using fewer plus or minus signs than in the given example? Note
that digits, such as 7 and 8 in the example, may be combined.

  • Math - ,

    what is 4,100 minus 2,398

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